Create Embeddings for Field(s) Firestore DB

Generates and stores vector embeddings for specified fields in Firestore documents. Accepts a Firestore project ID, an array of documents, the fields to embed, a target collection name, and an OpenAI API key. Returns a status and details of the embedding operation. It uses OpenAI's API to create embeddings for selected fields, formats them for Firestore, and batch-saves the enriched documents to the specified collection.